doc: Provide a bit more info in the README file

Qbs has a mirror on the GitHub.com and the README file is a starting
point for people who come to the website. It is nice to have quick
links that can be useful for newcomers.

Also, rename the README file to README.md to be able to use Markdown

Change-Id: I38394cf0a0802bfebebc9f070732041cfe24090c
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

1 files changed, 31 insertions, 0 deletions

diff --git a/README.md b/README.md
new file mode 100644
index 000000000..6f4a1bf9e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,31 @@
+# Qbs
+
+Qbs is a build automation tool designed to conveniently manage the build
+process of software projects across multiple platforms. Qbs can be used for any
+software project, regardless of programming language, toolkit, or libraries used.
+
+## Documentation
+
+Qbs product documentation is available at [doc.qt.io/qbs](http://doc.qt.io/qbs/index.html)
+
+The project's homepage is [wiki.qt.io/qbs](http://wiki.qt.io/qbs)
+
+## Supported platforms
+
+Qbs binaries are available for Windows, macOS, Linux, and FreeBSD.
+
+For more information about how to install Qbs on your platform, see the
+[Installing](https://doc.qt.io/qbs/installing.html) page in the documentation.
+
+Qbs allows to build applications for different platforms, for the list of
+supported platforms and the details about each platform, see the
+[Target Platforms](https://doc.qt.io/qbs/platforms.html) page.
+
+## Building Qbs
+
+For information about building Qbs from sources, see
+["Appendix A: Building Qbs"](http://doc.qt.io/qbs/building-qbs.html).
+
+## Reporting Bugs
+
+Please report any bugs in our [bug tracker](https://bugreports.qt.io/browse/QBS).